[PATCH] tweaks to editors/patch.c

[Rob Landley]

Two things:

1) Eliminate spurious warnings about possibly reduced hunks.  Instead only 
note a possible location if we don't find a non-reversed place to apply it.  
(Otherwise, hunks that move code forward around within a file look reversed at 
the removal site.)

2) Open the source file read-only, so we can apply patches to read-only files.

Rob
-- 
GPLv3: as worthy a successor as The Phantom Menace, as timely as Duke Nukem 
Forever, and as welcome as New Coke.
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